Rotary steam-engine.



P. C. BURHANS.

ROTARY STEAM ENGINE.

APPLICATION FILED AUG. 21, 1908.

Patented May 11, 1909.

3 SHEETS-SHEBT 1.

P. G. BURHANS. ROTARY STEAM ENGINE.

1 APPLIOATI-ON FILBD .fkUG. 21, $908. May 11 3 SHEETS-SHEET 2.

P. 0'. BU-RHANS.

ROTARY STEAM ENGINE.

APPLICATION 1111.21) AUG. 21, 1908.

Patented a 11,1909.

BET

3 S Til-SK 3 To all whom it 'mayconcern:

PAUL c. BURHANS, or

GLENDIVE, MONTANA ASSIGNOR OF ONE-HALF TO WALLACE E.

DUNKERLEX, OF GLENDIVE, MONTANA.

ROTARY STE M-ENGINE.

naeaosii.

Be it known that 1, PAUL C. BURHAN'S, a

citizen of the United States, residing at Glen- ."dire, in the county of Dawson and State 01' Montana, have invented a new and useful Rotary StanrFngine, of which the-follow ing'is a specification.

This invention relates to rotary engines and has for-its principal object to provide a novel form of engine in which the steam may he cut off zitany desiredpoint in the stroke and thereafter used exp'a-nsively.

A further object of the invention is to provide an engine of this type in which the entering -volnme of steam is discharged against the piston in such manner that both its pressure and impact may be used. A still further object of the invention is to provide a novel form of reversing mech anism.' I

With these and other objects in View, as will more fully hereinafter appear, the invention consists in certain novel featuresof construction and arrangement of parts, more fully hereinafter described, illustrated in the accompanying drawings, and more para ticularly pointed out n the appended claims, it being understood that various chan es in the form, proportion, size and mmondetails of construction may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings Figure 1 is a side elevation of a rotary engine constructed in accordance with the invention, a portion of the cylinder being broken away in order to illustrate the interior construction. Fig. 2 is a viewlooking from the opo iosite side of the engine. Fig. 3 is an end elevation. Fig. 4 isv a vertical section of the engine on the line 4-4: of- Fig. 3. Fig. 5 is a section on the line 5-5 of Fig. 4. Fig. ,6 a detail transverse section of the main valve.

Similar ployed to indicate corresponding parts throughout the several figures of the drawings.

The main body 10 of the cylinder and the base U are preferably formed of an integral casting, the cylinder being bored "out for the provided with openings for the, passage of Specification 0E Letters Patent.

numerals of reference are 'em- 1 Patented May 1 1, 1909.

Application filed August 21, 1908. Serial no, 449,695.

a shaft 13 and any suitable bearings may be provided ior the shaft at points. outside the heads. Secured rigidly to the shaft is a cylindrical piston drum leLthat is provided with a projecting wing 15, the opposite ends and the outer edges of the wing being provided with grooves for the reception of packing strips 16 that may be formed of any suitable material.

To the top of the cylinder is secured a casting 18 forming an abutment chamber and steam 'chest the former" being arranged for I the reception of a vertically movable abutment 19, which is provided with obliquely disposed grooves 20 for the reception of packing strips 21. This abutment is carried by a vertically disposed rod 22 that extends out through a stuffing box at. the top of the casinglS, and bearing on the top of the abutment is a compression sprin 24 that tends-to hold the abutment yieldingly againstthe periphery of the piston drum for the purpose of preventing theescape of steam from side to side of the abutn'ient.

Secured to the shaft 13 is a disk 25 having'acam groove 26 that is arranged for the reception of a projection or anti-friction roller 27 that; is 'di-sposcd at the lower end of a. vertically movable bracket 29 that projects from one of the cylinder heads. The upper end of the .rod is connected to the top oft-he rod 22- by means of a lever 80 that is centrally fulcrumed on a bracket 31, that is secured to the top of the casing 18.

At one end of the casing 18 is arranged a steam chest 34 that preferably is cylindrical in form, and with this chestcommunicates a main steam pipe 35. Leading from the chest are two steam pipes 36 and 37 which communicate with valve chambers 38 and 39. in the main steam chest is a rocking valve 40 having a stem 4.1 that projects lieyond thesteam chest. and carries an arm 42, said arm being connected by a pitman 43 to a sliding block 1-4 that is arranged in a link 45 pivoted at 4-6 to one of the cylinder heads. One end of the link 4-5 is connected bya rod 48, to the strap of eccentrics 49 on themain shaft 13, and as the shaft revolves the eccentrics will oscillate the link 45 and thereby impart rocking movement to the valve 40.. This will open and close the valve for the purpose of cutting off the entrance of steam at any desired point so that the first part of the stroke or revolu- 1 a link 53 to the link sure. In the casings 38 and 39 are arranged 'pansion of the body of steam admitted to through curved inlet ports 55 and 56 said theexl operate to direct the cylinder, a piston wing extending'from the piston, a. movable abutment arranged to press against the periphery of the piston, a cam carried by the shaft'and arranged to actuate the abutment,

tion may be accomplished by the impact and pressure of steam, and the'remaining port'ion lot the stroke accomplished by the ext-he working space of; the cylinder.

-At a point adjacent the engine is pivoted l a combined cut off and reversing" lever that isprovided with a latch bolt 'oforditherein, means for'actuating said valve, a pair of reversing valves, by said valves, the ports being arranged at nary construction arranged to engage a opposite sides of the abutment and being notched locking quadrant 51. From this curved to d rect the entering steam against r lever extends a rod 52 that is connected by the piston wing, anda combined cut off and position of the link may be shifted for the valves. purpose of altering the point of cut off or" 2. In 1 1Ot;1.ry i the main valve 40. extending therethrough,

The two valve casings 38 and 39 coniml111ithe shaft, a piston wing extending from the catewith the, working space of the cylinder drum, a 'slidable abutment actuating the cam on the shaft, a steam chest, a rocking I value therein, a stemextendingfrom said direct the volume of enteringsteam against valve, an arm carried by vsaid stem, an ecthe piston wing 15 so that the impact of the centric on the shaft, a pivotally mounted steam may be utilized as well as-its preslever connected to said eccentric, a link blockslidingin the link, a pitman connecting the block to the valve arm, a pair of auxiliary valve chambers in connnunication withthe steam chest, ports leading from. said auxiliary valve chambers to the working space of the cylinder, i auxiliary valve chambers, arms extending from said valves, a reversing lever, a rod extending therefrom and connected .to the valve arms, and a link extending from the rod and connected to the pitmani In testimony that I claim the foregoing as my own, I have hereto afiixed my signature.in the presence of two witnesses.

PAUL C. BURHANS; WVl CIIGSSGSI -C. A. BA'NKnn,

W. B. CHAPPELL.

block 4.4, so that the/ reversing lever connected to all of said a piston drum on ports being curved in 'such' manner as .to

reversing valves 57, the stems of which vare connected by arms 58 tothe rod 52 and when the parts are in the position shown in ,Fig'. l, the port 56 is the inlet port, while port 55 is the-exhaust-port. Should it be desired to reverse the direction of the pisdon; the lever -5O is pulled to the right and the block 14 is thus shifted beyond the pivot point 46 so that the position of all three valves is reversed and the port '55 will then become the inlet portwhile port 56 becomes iaustport, and the valve 4L0'will then entering steam to the valve casing 38.

l-Vhat is claimed is 1 In, a rotary engine,

a cylinder, a shaft. ext-endingtherethrough, a piston in said a steam chest, a valve ports controlled a cylinder, a shaft valves in said-- 

